PPCH™ OPERATION AND MAINTENANCE MANUAL
© 2009 DH Instruments, a Fluke Company
Page 70
be set has increased. However, it will also increase the maximum possible control error when
Ready
is indicated.
Table 10.
Default pressure control parameters
HOLD LIMIT
PRESSURE
STABILITY LIMIT
PRESSURE
TARGET LIMIT
RATE LIMIT
DYNAMIC
MODE
(standard and
hi volume)
± 0.01 % of active
range, or 0.003 % of
Q-RPT maximum
span, whichever is
greater
Not applicable
Not applicable
Not applicable
STATIC MODE
± 1 % of active range
± 0.005 % of active
range or 2 ppm of
Q-RPT maximum
span/second,
whichever is greater
Not applicable
Not applicable
MONOTONIC
MODE
Not applicable
Not applicable
1 % of Q-RPT
maximum span
0.05 % of Q-RPT
maximum span/second
RAMP MODE
± 25 % of target rate
Not applicable
Not applicable
Not applicable
CONTROL
IDLE
Not applicable
± 0.005 % of active
range or 2 ppm of
Q-RPT maximum
range/second,
whichever is greater
Not applicable
Not applicable
*Note: % of range limits are of default or AutoRanged range.
OPERATION
To access the CONTROL function, press
[SETUP]
,
<6control>
. The display is:
Dynamic,standard IH
1limits 2mode
Select
<1limits>
to view or edit the active control limits for the active control mode (see
Section 3.4.6.1).
Select
<2mode>
to change the active control mode (see Section 3.4.6.2).
3.4.6.1
<1LIMITS> (CUSTOM CONTROL PARAMETERS)
PURPOSE
To view active pressure control parameters and/or set custom control
parameters.
PRINCIPLE
See Section 3.4.6,
PRINCIPLE.
OPERATION
[SETUP], <6control>, <1limits> views and/or sets limits for the active control
mode only. To set limits for a control mode other than the active control mode,
select that control mode first using [SETUP], <6control>, <2mode>.
To view active control parameters and/or set custom control parameters, press
[SETUP]
,
<6control>
,
<1limits>
from the MAIN RUN screen. The display is
depends upon the active control mode.
To reset default control parameters for a range and control mode, select the
control mode using [SETUP], 6control, 2mode.
